56461220553 has 36 divisors (see below), whose sum is σ = 79898863824. Its totient is φ = 35460406800.

The previous prime is 56461220533. The next prime is 56461220567. The reversal of 56461220553 is 35502216465.

It is not a de Polignac number, because 56461220553 - 2⁹ = 56461220041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56461220513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 48215658 + ... + 48216828.

It is an arithmetic number, because the mean of its divisors is an integer number (2219412884).

Almost surely, 2^56461220553 is an apocalyptic number.

It is an amenable number.

56461220553 is a deficient number, since it is larger than the sum of its proper divisors (23437643271).

56461220553 is a wasteful number, since it uses less digits than its factorization.

56461220553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1404 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 56461220553 in words is "fifty-six billion, four hundred sixty-one million, two hundred twenty thousand, five hundred fifty-three".